CXLB7304 is a switching Li-Ion battery charger with dynamic power-path control and input current limiting. When a battery is connected, depending on the battery voltage, the DC-DC switching regulator either pre-conditions, fast-charges the battery or just regulates a system voltage (VSYS) to a preset voltage. It does not require an external sense resistor for current sensing. The fastcharging current is determined by programming ISET1 or ISET2 pin, depending on the state of the USB_DET. If USB_DET is high, indicating n valid USB input is present, the fast charge current is set by ISET2; otherwise, it is set by ISET1. When the battery voltage reaches the termination voltage i.e. 4.35V, the charging path disconnects SYS to BATT. The CXLB7304 also includes a dynamic power path when the SYS load current exceeds current limitof the DCDC regulator internally set, the SYS voltage falls below VBATT, CXLB7304 turns on the power-path to supplement the system load through the battery
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目录
1.产品概述 2.产品特点 3.应用范围 4.技术规格书下载（PDF文档）
一.产品概述
CXLB7304是一款充电电流达2.5A的单节锂电开关型充电。其集成了动态路径管理功能，内部路径的开关内阻仅50mohm，允许系统在没有电池的情况下，仍然可以在适配器存在是维持系统正常工作。CXLB7304有特有的2级充电设定可通过引脚的0,1来设定，且电流设定无需昂贵的精密电阻。CXLB7304还具有输入电流自动检测维持输入电压的功能，保证输入供电不足时，不把输入接口拉死。其他锂电池充电所必须的功能，CXLB7304也一应俱全，如电池温度异常关断，充电超时关断，过流，过热保护等。CXLB7304采用QFN3x-16封装，是迄今性价比最高，外围最简洁的开关型锂电充电IC。
CXLB7304 is a switching Li-Ion battery charger with dynamic power-path control and input current limiting. When a battery is connected, depending on the battery voltage, the DC-DC switching regulator either pre-conditions, fast-charges the battery or just regulates a system voltage (VSYS) to a preset voltage. It does not require an external sense resistor for current sensing. The fastcharging current is determined by programming ISET1 or ISET2 pin, depending on the state of the USB_DET. If USB_DET is high, indicating n valid USB input is present, the fast charge current is set by ISET2; otherwise, it is set by ISET1. When the battery voltage reaches the termination voltage i.e. 4.35V, the charging path disconnects SYS to BATT. The CXLB7304 also includes a dynamic power path when the SYS load current exceeds current limitof the DCDC regulator internally set, the SYS voltage falls below VBATT, CXLB7304 turns on the power-path to supplement the system load through the battery.
二.产品特点
◆输入电压达6.5V
◆2.5A充电电流
◆动态路径管理
◆输入维持电压4.5V
◆电池充电截止电压4.35V
◆两级充电电流设定
◆无需毫欧级精密电阻
◆高达95%的转换效率
◆3MHz开关频率
◆空载待机电流70uA
◆Switching Charger with Power Path Management
◆ Up to 95% DC-DC Efficiency
◆ 50mΩ Power Path MOSFET
◆ Up to 2.5A Max charging current◆
◆4.35V charging termination voltage
◆ Instant on with a dead Battery or no Battery
◆ No battery detection
◆ No External Sense resistor
◆ Programmable USB and AC IN Charging Current
三.应用范围
◆平板电脑
◆智能手机
◆移动电源
◆其他含大容量锂电池的电子设备
四.技术规格书（产品PDF)
需要详细的PDF规格书请扫一扫微信联系我们，还可以获得免费样品以及技术支持！
五.产品封装图
六.电路原理图
七.相关芯片选择指南
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锂电充电 |
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|
Device |
Device |
Architecture |
VIN |
Final |
Power Path |
IOUT |
Vhold |
Switching |
IQ |
Package |
|
|
Description |
(min) |
(max) |
Vbat |
Rdson |
(max) |
(V) |
Frequency |
(uA) |
|||
|
(V) |
(V) |
(mohm) |
(A) |
(Hz) |
|||||||
|
2.5A开关型锂电充电 |
开关充电+路径管理 |
4.3 |
6.5 |
4.2 |
50 |
2.5 |
4.3 |
3M |
70 |
QFN3x3-16 |
|
|
2.5A开关型锂电充电 |
开关充电+路径管理 |
4.3 |
6.5 |
4.2 |
50 |
2.5 |
4.3 |
3M |
70 |
ESOP8 |
|
|
2.5A开关型锂电充电 |
开关充电+路径管理 |
4.3 |
6.5 |
4.2 |
50 |
2.5 |
4.5 |
3M |
70 |
QFN3x3-16 |
|
|
2.5A开关型锂电充电 |
开关充电+路径管理 |
4.3 |
6.5 |
4.35 |
50 |
2.5 |
4.5 |
3M |
70 |
QFN3x3-16 |
|
|
3A开关型充电/OTG |
开关充电/OTG |
4.3 |
6 |
4.2/4.35 |
N/A |
3 |
Adj |
1-2M |
10 |
QFN4x4-32 |
|
|
3A开关型充电/OTG |
开关充电/OTG |
4.3 |
6 |
4.2 |
N/A |
3 |
4.6 |
1-2M |
10 |
QFN3x3-20 |
|
|
2.5A开关型锂电充电 |
开关充电+路径管理 |
4.3 |
6.5 |
4.35 |
50 |
2.5 |
4.3 |
3M |
70 |
ESOP8 |
|
